Question about Outlook meeting invitations and Entourage

[tomdkat]

I've got a question about Outlook users sending meeting invitations t
an Entourage user. Is an Exchange server required for Entourage t
recognize the meeting invitation as an actual invitation so it
calendar can be updated?

I can send meeting invitations from Outlook users to other Outloo
users and when the recipients open the invitation e-mail, the "Accept
button is enabled and the meeting can then be added to the recipient'
calendar.

When an external Outlook user (from a customer of the company fo
example) sends an invitation through an Exchange server to my Entourag
user, Entourage recognizes the invitation and the user can update thei
calendar. When an internal Outlook user sends an invitation _without
an Exchange server being involved, Entourage doesn't recognize th
invitation and I noticed the mail headers didn't contain
"text/calendar" part.

Is an Exchange server required in this case?

Thanks!

Peace...

To